An Rauth request completes setup of the auth file. Completion of the auth request does not imply that the user is authenticated; The user must complete authentication by tunneling an agreed-upon authentication file through the authentication file. The specific authentication protocol is outside the scope of 9P.
of_iovec verifies a message from an I/O vector. No copying is done, and of_iovec only performs bounds checks. Modifying the underlying I/O vector will change the results when accessing message fields.